The present disclosure relates to a power line assembly and an electronic device using the power line assembly. The power line assembly may include: a power line; a power plug disposed at a first end of the power line and configured to couple with a power outlet; and a power line base disposed at a second end of the power line and having a top surface and a bottom surface, each of the top and bottom surfaces having one or more power-delivery contacts, wherein when the power line base couples with a power-receiving assembly of an electronic device, at least one of the power-delivery contacts contacts with a power-receiving contact of the power-receiving assembly, to deliver power to the electronic device.